DataVXAdvanced SciencePaper
journal article·2025-11Open access

Bright Light Emission from Deep Energy States

Lian Xiao, Sihang Liu, Zhan Yu, Yong Yi, Rui Duan, Quanchao Du, Yugang Zhao, Xuehong Zhou, Van Duong Ta, Edwin Kok Lee Yeow, Yi Huang, Zhi‐Gang Zheng, Handong Sun

Advanced Science· Volume 12· Issue 41
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Source abstract

Abstract

Abstract Deep energy states, a fundamental concept in semiconductor physics, play a pivotal role in determining the optical performance of semiconductor materials. They are generally regarded as undesirable defects, as they can serve as efficient centers for non‐radiative recombination. Thus, the prevailing consensus is that deep energy states must be passivated and mitigated to enhance the optical properties of semiconductors. In this work, however, it is demonstrated that these “ undesirable” deep energy states can be harnessed as “ desirable” states to enable bright light emission. This is achieved by proposing a deep energy state regulation mechanism, termed “surface ionization annealing”, which transforms the randomly and broadly distributed non‐radiative deep energy levels into a narrower energy range. This transformation results in a high density of states and band‐edge‐like absorption originating from deep energy states in sulfur quantum dots. The regulation is realized through precise control of surface charge and surface dangling bonds. Simultaneously, surface ionization annealing eliminates non‐radiative deep energy states, significantly enhancing the photoluminescence quantum yield (PLQY) of sulfur quantum dots to 15.6%. Consequently, the simultaneous realization of a high density of states and high PLQY enables bright light emission from deep energy states.
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Research context

Electronic materialsMaterials processing

OpenAlex topics: Dark Matter and Cosmic Phenomena · Atomic and Subatomic Physics Research · Advanced Semiconductor Detectors and Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Physics East China University of Science and Technology Shanghai 200237 China

Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 21 Nanyang Link Singapore 637371 Singapore

Research Institute of Aero‐Engine Beihang University No.37 XueYuan Road, Haidian District Beijing 100083 China

Beijing An Zhen Hospital Affiliated of Capital University of Medical Sciences Beijing 100029 China

Center of Growth Metabolism and Aging Key Laboratory of Bio‐Resource and Eco‐Environment of Ministry of Education College of Life Sciences Sichuan University Chengdu 610064 China

Institute of Applied Physics and Materials Engineering University of Macau Macao SAR 999078 China

School of Chemistry Chemical Engineering & Biotechnology Nanyang Technological University Singapore 637371 Singapore

Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering School of Energy and Power Engineering University of Shanghai for Science and Technology Shanghai 200093 China

Department of Optical Devices Le Quy Don Technical University Hanoi 100000 Vietnam

Funding

National Key Research and Development Program of China · National Natural Science Foundation of China

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